[Editing][DOM][CodeHealth] Make Node::hasEditableStyle global functions.

third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp

Index: third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
diff --git a/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp b/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
index 1034596615e1f722207656ac81c84221c37fd687..913fc9df2d5532021fadf84795bcf4cbed427fc5 100644
--- a/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
+++ b/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
@@ -335,7 +335,7 @@ static Position firstEditablePositionInNode(Node* node)
 {
     DCHECK(node);
     Node* next = node;
-    while (next && !next->hasEditableStyle())
+    while (next && !hasEditableStyle(*next))
         next = NodeTraversal::next(*next, node);
     return next ? firstPositionInOrBeforeNode(next) : Position();
 }
@@ -347,7 +347,7 @@ void DeleteSelectionCommand::removeNode(Node* node, EditingState* editingState,
 
     if (m_startRoot != m_endRoot && !(node->isDescendantOf(m_startRoot.get()) && node->isDescendantOf(m_endRoot.get()))) {
         // If a node is not in both the start and end editable roots, remove it only if its inside an editable region.
-        if (!node->parentNode()->hasEditableStyle()) {
+        if (!hasEditableStyle(*node->parentNode())) {
             // Don't remove non-editable atomic nodes.
             if (!node->hasChildren())
                 return;